Read about the four finalists in the Variable Frequency Drives and Variable Speed Drives category for the Consulting-Specifying Engineer 2015 Product of the Year program.

Amanda Pelliccione

04/06/2015

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Screw compressor with integrated VSDThe CSVW2 is an energy-efficient positive displacement compact screw compressor specially designed for liquid chillers with low condensing temperature applications. To achieve a high coefficient of performance for this type of application—and thus exceptional IPLV and ESEER ratings—Bitzer has integrated a permanent magnet motor and innovative drive technology into this compact screw design. The internal volume ratio of the compressor is adjusted to allow the CSVW2 series to achieve high efficiency in the lower speed and load range. The integrated variable speed drive (VSD) is refrigerant gas-cooled and pre-wired with the motor, sensors, and controls.

Decentralized variable frequency driveThe PowerGate 66 IP66/NEMA 4 variable frequency drive (VFD) is a stand-alone engineered solution that incorporates a version of the Mitsubishi Electric E700 VFD into a custom-made, water-resistant enclosure for use in harsh environments. The PowerGate 66 drive is ideal for applications that require precise motor speed, pump, and/or fan control in wet or dusty locations. The VFD’s design places it closer to the motor, improving efficiency and preventing motor damage, while the enclosure protects against dirt and water. Connection to Ethernet and other factory communications networks is also possible with the PowerGate 66.